#include <stdio.h>

int main(void)
{
    printf("\n");

    const int ROWS = 6;
    const int CHARS = 6;
    int row;
    char ch;
    for (row = 0; row < ROWS; row++)
    {
        printf("%d.", row);
        for (ch = ('A' + row); ch < ('A' + CHARS); ch++)
        {
            printf("%c", ch);
        }
        printf("\n");
    }

    return 0;
}